Patrick Ledingham's Hybrid Quantum Networks Lab develops light-matter interfaces for large-scale quantum photonic networks. Research: (1) warm and cold atomic ensemble quantum memories (ORCA protocol in warm Rb vapour) for telecom-wavelength photon storage; (2) atom-photon entanglement generation; (3) multiplexed quantum memories for repeater nodes. Key for quantum sensing via atom-photon entanglement and quantum repeater architectures.